Breaking change for ts plugin when moving from peggy 1.1.0 to 1.2.0

[pjmolina]

Hi.
I am the maintainer of ts-pegjs to generate a TypeScript parser relaying on peggy.
Noticed that from moving from peggy 1.1.0 to 1.2.0 the following functions were internalized (make private, before were public):

• stringEscape() and
• regexpClassEscape()

My code relies on calling this functionality. See here. It could be nice if peggy could keep it public to make it DRY for all and avoid code repetition between core lib and plugins.

Thanks